GM Service Manual Online
For 1990-2009 cars only

Coolant Heater Cord Replacement Original

Removal Procedure


    Object Number: 661139  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the coolant heater electrical connector (2).
  3. Remove the coolant heater cord retainer and bolts.
  4. Remove the coolant heater cord.

Installation Procedure

  1. Install the coolant heater cord.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the coolant heater cord bolts and retainer.
  4. Tighten
    Tighten the coolant heater cord bolts to 8 N·m (71 lb in).


    Object Number: 661139  Size: SH
  5. Connect the coolant heater electrical connector (2).
  6. Lower the vehicle.

Coolant Heater Cord Replacement 6.6L

Removal Procedure


    Object Number: 1371526  Size: SH
  1. Disconnect the coolant heater electrical connector.

  2. Object Number: 1371522  Size: SH
  3. Remove the coolant heater cord retainer and bolts.

  4. Object Number: 1371529  Size: SH
  5. Remove the coolant heater cord from the floor and dash panel.

Installation Procedure

    Notice: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.


    Object Number: 1371529  Size: SH
  1. Install the coolant heater cord to the floor and dash panel.

  2. Object Number: 1371522  Size: SH
  3. Position the coolant heater cord to the front of the engine.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the coolant heater cord bolts and retainer.
  6. Tighten
    Tighten the bolts to 8 N·m (71 lb in).


    Object Number: 1371526  Size: SH
  7. Connect the coolant heater electrical connector.